Mixing-valve



G. B. EMERSON AND C. E. BUYSSE.

' MIXING VALVE.

APPLICATION FlLED SEPT. I6, I916.

Patented Aug. 31, 1920.,

GEORGE B. EMERSON AND CHARLES BUYSSE, OF DETROIT, MICHIGAN.

MIXING-VAL E.

Specification of Letters Patent.

Patented Aug. 31, 1920.

Application filed September 16, 1916. Serial No. 120,441.

To all whom it may concern:

Be it known that we, GEORGE B. EMERSON and (humans E. BUYssE, citizensof the United States, residing at Detroit, county of Wayne, State ofMichigan, have invented a certain new and useful Improvement inMixingvalves, and declare the following to be a full, clear, and exactdescription of the same, such as will enable others skilled in the artto which it pertains to make and use the same, reference being had tothe accompanying drawings, which form a part of this specification.

Our invention relates to air and gas mixers and an object of ourimprovements is to provide an improved suction mixing valve for gasengines in which the air and gas will be eificiently mingled and theproportions of the same accurately gaged and maintained.

We secure this object in the device illustrated in the accompanyingdrawings in which,

Figure 1 is a plan view of a valve embodying our invention.

Fig. 2 is a central sectional elevation of the same.

F 'g. 3 is an elevation looking from the right of Fig. 2.

Fig. 4 is a section on the line D--I) Fig. 2, looking from above saidline.

F ig. 5 is a diagrammatic view of the valve with a part of the intakepipe cut away to show the valve for balancing the pressure from the gassupply.

a is the casing of the valve having a contracted, or venturi, portion (1and a flange a by which the valve is secured to the intake of theengine. 6 are a plurality of aper-' tures formed at various points,substantially symmetrically located, through the wall of the casing aabove the contracted portion a and communicating immediately with theouter air. I) is a hollow projection from the casing a provided withinternal screw threads by which the valve is connected to the source ofgas supply by the usual piping. b is an aperture formed through theshell of the casing a and opening to the interior of the propection b.

c is a plug fitting and adapted to turn in the casing a and providedwith apertures 0* adapted to register with the apertures 79 in thecasing a. As the plug 0 is turned the apertures a register more or lesswith the apertures b to vary the area of passage bv which the air entersthe casing a. 0 is a similar aperture through the wall of the plug 0adapted to register more or less with aperture 6 to vary the area ofpassage for the gas. The aperture 0 opens to a lateral passage in theplug 0 which at the center of said plug turns downward in a passagecoaxial with said plug which is extended in a pipe 0 to a point justbelow the contraction 0: in the casing a. a is a retaining ring forholding the plug 0 in position and c is a handle by which the plug 0 maybe turned.

(4 (Figs. 3 and 4) is a small auxiliary opening located at the side ofone of the openings 6 and adjacent thereto. As the plug 0 is turnedtoward the side at which the small aperture o is located to contract thearea of passage of air and gas through the opening Z1 0* and b 0respectively, the aperture 42 remains in full registry with an aperture0 in the plug so that the air is shut off less rapidly than the gas whenthe parts are adjusted for running the engine idling.

a o are conventional set screws by which the extent of travel of thehandle 0 and the turning of the plug a is adjusted.

Inasmuch as there is usually a slight pressure of gas above that of theatmosphere, a ball valve 6 (Fig. 5) is interposed in the gas intakepassage to balance such pressure.

It will be observed that the extension 0 carries the delivery end of thegas passage below the contraction a in the casing a thus as air issucked from said casing the increased rush of air through the venturipassage draws the gas from the passage 0 at a greater rate and maintainsthe proper mixture and the passages for delivery of gas and air coactwith each other.

The delivery opening from the passage 0 extends into or a little beyondthe contraction of the delivery passage for air so that the air and gasare simultaneously and equally acted upon by the suction of the engine.

What we claim is:

In an apparatus of the kind described, a casing having an air passageformed therein, means for delivering air into said passage, said passagebeing contracted toward the delivery end thereof beyond the portion mostcontracted portion thereof at its delivery and, 'means for supplying gas'to the inner portion of said pipe, said oasingheing adapted to besecured to the intake of the engine so that the suction of theengineshall come directly on the delivery end of said air passage. i Y

, In testimony whereof, We sign this specification. GEORGE B. EMERSON;CHARLES E. BUYSSE.

